BUG: Purchase Order Item Table - Item not showing manually added project

I am having an issue with the project field staying populated when I add an item manually to a PO. See the pictures below.

I asked the gentleman who does our customization about the issue, and here is what he told me to send to you:

the case is in your purchase order some how the project will reset to blank after save …

here was the error in console log : TypeError: this.grid.visible_columns is undefined

but the project will not reseted if the project is filled by get from material request

please forward the message this might could help them…

Update 8.3 fixed the issue.